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Related Concept Videos

Neuroplasticity01:01

Neuroplasticity

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Neuroplasticity reflects the brain's remarkable capacity to adapt and evolve, responding dynamically to learning, experiences, or injury by reorganizing its neural circuitry. This reorganization involves creating new neural connections and refining old ones through a series of biological processes that contribute to the brain's lifelong development and adaptability.
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Long-term Potentiation01:25

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Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
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Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre- and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
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Long-term depression, or LTD, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTD is the process of synaptic weakening that occurs over time between pre and postsynaptic neuronal connections. The synaptic weakening of LTD works in opposition to synaptic strengthening by long-term potentiation (LTP) and together are the main mechanisms that underlie learning and memory.
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Long-term depression, or LTD, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTD is the process of synaptic weakening that occurs over time between pre and postsynaptic neuronal connections. The synaptic weakening of LTD works in opposition to synaptic strengthening by long-term potentiation (LTP) and together are the main mechanisms that underlie learning and memory.
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Neural circuits and neuronal pools are two of the main structures found in the nervous system. Neural circuits are networks of neurons that work together to carry out a specific task or process. They consist of interconnected neurons and glial cells, which provide structural and metabolic support.
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Slice Patch Clamp Technique for Analyzing Learning-Induced Plasticity
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Circuit mechanisms for cortical plasticity and learning.

Ronan Chéreau1, Leena E Williams2, Tanika Bawa3

  • 1Department of Basic Neurosciences and the Center for Neuroscience, CMU, University of Geneva, Rue Michel Servet 1, 1211 Geneva, Switzerland.

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The cerebral cortex uses dynamic synaptic plasticity to integrate information for perception and action. This involves coordinated feedforward, feedback, and local circuits altering neuronal responses during learning.

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Cortical plasticityHigher-order feedbackLearningSensory cortex

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Area of Science:

  • Neuroscience
  • Computational Neuroscience
  • Cognitive Neuroscience

Background:

  • The cerebral cortex integrates sensory input, emotions, and internal states for perception, association, and action.
  • Neuronal networks in the cortex must dynamically retrieve and encode information to optimize perception.
  • Classical Hebbian plasticity models provide a foundation for understanding cortical learning.

Purpose of the Study:

  • To describe cortical plasticity mechanisms underlying information processing.
  • To elucidate how feedforward, feedback, and modulatory inputs alter synaptic strength and neuronal responses.
  • To highlight the role of local disinhibitory circuits in cortical plasticity.

Main Methods:

  • Review of current hypotheses on cortical plasticity.
  • Description of mechanisms involving feedforward and long-range feedback inputs.
  • Analysis of the role of local disinhibitory circuit motifs.

Main Results:

  • Cortical plasticity involves the coordinated action of feedforward and feedback information streams.
  • Synaptic strength and neuronal response properties are altered through experience and learning.
  • Local disinhibitory circuits play a crucial role in these plasticity mechanisms.

Conclusions:

  • The cerebral cortex dynamically adapts through coordinated synaptic plasticity.
  • Understanding these mechanisms is key to comprehending perception, learning, and action.
  • The interplay of different neuronal inputs and local circuits is essential for cortical function.